:user-valid (:-moz-ui-valid)
Quick Summary for :user-valid
:user-valid CSS pseudo-class represents any validated form element whose value validates correctly based on its validation constraints. However, unlike :valid it only matches once the user has interacted with it.
Code Usage for :user-valid
<form> <label for="email">Email *: </label> <input id="email" name="email" type="email" value="test@example.com" required> <span></span> </form> More Details for :user-valid
:user-valid (:-moz-ui-valid)
The :user-valid CSS pseudo-class represents any validated form element whose value validates correctly based on its validation constraints. However, unlike :valid it only matches once the user has interacted with it.
Note: The pseudo-class behaves in the same way as the non-standard :-moz-ui-valid pseudo-class.
This pseudo-class is applied according to the following rules:
If the control does not have focus, and the value is valid, apply this pseudo-class. If the control has focus, and the value was valid (including empty) when it gained focus, apply this pseudo-class. If the control has focus, and the value was invalid when it gained focus, re-validate on every keystroke. If the element is required, the preceding rules apply only if the user has changed the value or attempted to submit the form.The result is that if the control was valid when the user started interacting with it, the validity styling is changed only when the user shifts focus to another control. However, if the user is trying to correct a previously-flagged value, the control shows immediately when the value becomes valid. Required items are flagged as invalid only if the user changes them or attempts to submit an unchanged invalid value.
Syntax
:user-valid
Examples
Setting a color and symbol on :user-valid
In the following example, the green border and ✅ only display once the user has interacted with the field. Try changing the email address to another valid email to see it in action.
<form> <label for="email">Email *: </label> <input id="email" name="email" type="email" value="test@example.com" required> <span></span> </form> input:user-valid { border: 2px solid green; } input:user-valid + span::before { content: '✓'; color: green; } Specifications
| Specification |
|---|
| Selectors Level 4 # user-valid-pseudo |
See also
:valid :invalid :required :optional :user-invalid Last modified: Aug 12, 2021, by MDN contributors
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"Olivia, my eldest daughter, caught measles when she was seven years old. As the illness took its usual course I can remember reading to her often in bed and not feeling particularly alarmed about it. Then one morning, when she was well on the road to recovery, I was sitting on her bed showing her how to fashion little animals out of coloured pipe-cleaners, and when it came to her turn to make one herself, I noticed that her fingers and her mind were not working together and she couldn’t do anything. 'Are you feeling all right?' I asked her. 'I feel all sleepy,' she said. In an hour, she was unconscious. In twelve hours she was dead. The measles had turned into a terrible thing called measles encephalitis and there was nothing the doctors could do to save her. That was...in 1962, but even now, if a child with measles happens to develop the same deadly reaction from measles as Olivia did, there would still be nothing the doctors could do to help her. On the other hand, there is today something that parents can do to make sure that this sort of tragedy does not happen to a child of theirs. They can insist that their child is immunised against measles. ...I dedicated two of my books to Olivia, the first was ‘James and the Giant Peach’. That was when she was still alive. The second was ‘The BFG’, dedicated to her memory after she had died from measles. You will see her name at the beginning of each of these books. And I know how happy she would be if only she could know that her death had helped to save a good deal of illness and death among other children."
I just checked google books for BFG, and the dedication is there.
https://www.google.com.au/books/edition/_/quybcXrFhCIC?hl=en&gbpv=1
Roald Dahl, 1986
